Dust-sucking arm of an air cleaning machine

ABSTRACT

A dust-sucking arm of an air cleaning machine includes two flexible ducts respectively connected between two rigid ducts and between one rigid duct and the wind-guiding opening. Three pivotal bases are assembled at the outer sides of the rigid ducts and the flexible ducts. Two parallel connecting rod units are respectively and pivotally assembled between two adjacent pivotal bases. One connecting rod of each parallel connecting rod unit is fixed with the relative rigid duct to actuate the rigid duct to move. Two pressure cylinders are respectively and pivotally installed between a connecting duct and the relative pivotal base, supporting the connecting rod unit. Two locking members are respectively installed between one connecting rod and the pivotal base, locking the connecting rod to stop the connecting rod unit.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a dust-sucking arm of an air cleaning machine, particularly to one simple in structure and able to be adjusted and positioned easily and quickly.

2. Description of the Prior Art

Generally, many kinds of manufacturing equipment are likely to produce dust, and some instruments have to work under a certain dustless environment; therefore, air cleaning machines have to be employed for removing dust from the environment. A conventional air cleaning machine generally has a dust-sucking duct connected with the wind-sucking opening of the machine body to enable the air cleaning machine to carry out dust sucking work quickly and accurately. In operating, the dust-sucking duct is adjusted to face the location where dust is produced or left over so that the dust can be sucked into the air cleaning machine to be filtered and collected and then clean air is sent out, attaining purpose of dust sucking and air cleaning.

However, most dust-sucking ducts connected with conventional air cleaning machines are soft ducts that cannot be self-stabilized at the location where dust is to be sucked but have to be held stably in position manually, resulting in much inconvenience in operating, especially when dust sucking work lasts long. Sometimes, an operator may keep the dust-sucking duct in position by using nearby articles for support or fix it in position by hanging, but neither of these two methods can stably position the dust-sucking duct; therefore, the dust-sucking duct always has to be positioned anew in case a dust sucking location is changed. For the present, although a cantilever-typed dust-sucking duct is employed and is able to be positioned stably, yet it is comparatively precise and complicated in structure, resulting in increase in cost and causing inconvenience in adjusting and operating.

SUMMARY OF THE INVENTION

The objective of the invention is to offer a dust-sucking arm of an air cleaning machine, including two flexible ducts respectively connected between two rigid ducts and between one rigid duct and the wind-guiding opening of the air cleaning machine. Three pivotal bases are respectively assembled at the outer sides of the rigid ducts and the flexible ducts. Two parallel connecting rod units respectively consisting of two parallel connecting rods are respectively and pivotally assembled between two adjacent pivotal bases. One connecting rod of each parallel connecting rod unit is fixedly connected with the relative rigid duct for actuating the rigid duct to shift synchronously. Two pressure cylinders are respectively and pivotally installed between one connecting rod and the relative pivotal base for helping to support the parallel connecting rod unit. Two locking members are respectively fastened between a connecting rod and the relative pivotal base for firmly fixing the pivotal end of the connecting rod on the pivotal base to stop the whole parallel connecting rod unit from moving pivotally. By unfastening the locking member, the parallel connecting rod unit can be properly moved bias to actuate the rigid duct to shift and make the flexible duct curved, and the rear rigid duct can be freely adjusted and fixed at a location where dust needs to be sucked, able to carry out dust sucking work steadily and smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS

This invention will be better understood by referring to the accompanying drawings, wherein:

FIG. 1 is a perspective view of a dust-sucking arm of an air cleaning machine in the present invention:

FIG. 2 is a partial exploded perspective view of the dust-sucking arm of an air cleaning machine in the present invention:

FIG. 3 is a side view of the dust-sucking arm of an air cleaning machine in the present invention:

FIG. 4 is a side view of the dust-sucking arm adjusted in position after unfastening a first locking member in the present invention:

FIG. 5 is a side view of the dust-sucking arm adjusted in position after unfastening a second locking member in the present invention:

FIG. 6 is a side view of the dust-sucking arm adjusted in position after unfastening both the first and the second locking members in the present invention: and

FIG. 7 is a side view of the dust-sucking arm having its wind-sucking shade adjusted by a joint member in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A preferred embodiment of a dust-sucking arm of an air cleaning machine in the present invention, as shown in FIGS. 1, 2 and 3, includes a rotary base 10, two rigid ducts 20, three flexible ducts 30, three pivotal bases 40, two parallel connecting rod units 50, two pressure cylinders 60, two locking members 70, a wind-sucking shade 80 and a joint member 90 combined together.

The rotary base 10 consists of a stationary shaft base 11 and a rotatable base 12. The stationary shaft base 11 is fixed at the location of the wind-sucking opening (1 a) of the air cleaning machine 1, having a shaft tube 111 formed in the center. The rotatble base 12 is pivotally fitted on the shaft tube 111 of the stationary shaft base 11, having a connecting tube 121 formed on the topside.

The three flexible ducts 30 can be bellow tubes. One of the three flexible ducts 30 is fitted with the connecting tube 121 of the rotatable base 12 and the corresponding rigid duct 20, another flexible duct 30 is fitted between the two rigid ducts 20 and the third flexible duct 30 is fitted between the corresponding rigid duct 20 and the wind-sucking shade 80.

The three pivotal bases 40 include a first pivotal base 40 a fixed on the rotatable base 12, a second pivotal base 40 b positioned between the two rigid ducts 20 and a third pivotal base 40 c positioned at the end of the rear rigid duct 20.

The two parallel connecting rod units 50 are respectively formed with two parallel connecting rods 51. One of the two parallel connecting rod units 50 has its two connecting rods 51 pivotally assembled between the first pivotal base 40 a and the second pivotal base 40 b, and the other parallel connecting rod unit 50 has its two parallel connecting rods 51 pivotally assembled between the second pivotal base 40 b and the third pivotal base 40 c. Each parallel connecting rod unit 50 has its upper connecting rod 51 secured with a corresponding rigid duct 20 by means of connecting plates 52 so that the two rigid ducts 20 can be respectively moved bias synchronously together with the relative parallel connecting rod units 50.

The two pressure cylinders 60 are respectively assembled between the two parallel connecting rods 51 of the two parallel connecting rod units 50. One pressure cylinder 60 has one end pivotally fixed at a proper location of the first pivotal base 40 a and the other end pivotally connected with the connecting rod 51 near the front rigid duct 20, and the other pressure cylinder 60 has one end pivotally fixed at a proper location of the second pivotal base 40 b and the other end pivotally connected with the connecting rod 51 near the rear rigid duct 20, with a proper support angle formed between the pressure cylinder 60 and the relative connecting rod 51, letting the pressure cylinder 60 assist to support the parallel connecting rod unit 50.

The two locking members 70 are respectively fastened on the lower connecting rod 51 of the two parallel connecting rod units 50 at the pivotal portions respectively corresponding to the first pivotal base 40 a and the third pivotal base 40 c. Thus, the locking member 70 can be pulled and turned manually to have the pivotal end of the connecting rod 51 locked with the first pivotal base 40 a or with the third pivotal base 40 c to stop the whole parallel connecting rod unit 50 from being turned pivotally.

The wind-guiding shade 80 is fitted on the rear flexible duct 30 and formed with a trumpet-shaped dust-sucking opening 81.

The joint member 90 consists of a connecting ring 91 movably fitted on the outer side of the rear flexible duct 30 and four connecting strips 92 pivotally and equidistantly fixed on the connecting ring 91. The two symmetrical pivotal connecting strips 92 at the rear side of the connecting ring 91 have their ends secured with the wind-guiding shade 80 and the other two symmetrical pivotal connecting strips 92 at the front side of the connecting ring 91 have their ends fixed with the rear rigid duct 20 so that the wind-guiding shade 80 can be adjusted to move bias in any direction.

Referring to FIG. 3, the dust-sucking arm of the air cleaning machine in the present invention can be quickly adjusted and fixed in position for matching with change of dust-sucking locations. Based on the structure of the dust-sucking arm of this invention, only when the two parallel connecting rods 51 and their corresponding pivotal base 40 are pivotally turned synchronously, can the parallel connecting rod units 50 be moved bias. Therefore, the whole parallel connecting rod unit 50 will be impossible to move bias so long as any pivotal portion of one of connecting rods 51 is locked by the locking member 70 and impossible to move. Before the dust-sucking arm is adjusted and operated, the two locking members 70 are normally in a locking condition to keep the dust-sucking arm immovable. When the air cleaning machine is to carry out dust sucking and air cleaning work, but the dust-guiding opening 81 of the wind-sucking shade 80 at the outer end of the dust-sucking arm is not yet aligned to a dust sucking location, the dust-sucking arm has to be adjusted first to let the dust-guiding opening 81 face the dust sucking location. Operation for adjusting the dust-sucking arm generally includes three modes described as follows.

A first mode, as shown in FIG. 4: It is optional to unfasten the locking member 70 locked on the first pivotal base 40 a and the relative parallel connecting rod unit 50 to enable the first and the second pivotal base 40 a, 40 b and the two parallel rods 51 connected therebetween to move bias and actuate the relative rigid duct 20 to move bias too, letting the two flexible duct 30 at the opposite ends of the rigid duct 20 become curved properly. Thus, the dust-sucking arm can be partially adjusted and shifted.

A second mode, as shown in FIG. 5: It is optional to unfasten the locking member 70 locked on the third pivotal base 40 c and the relative parallel connecting rod unit 50 to enable the second and the third pivotal base 40 b, 40 c and the parallel connecting rod unit 50 connected therebetween to move bias and actuate the rear rigid duct 20 to move bias, too, letting the two flexible ducts 30 at the opposite ends of the rear rigid duct 20 become curved properly, thus attaining another adjustment and shift of the dust-sucking arm.

A third mode, as shown in FIG. 6: It is optional to unfasten the two locking members 70 at the same time to enable the two parallel connecting rod units 50 and the first, the second and the third pivotal base 40 a, 40 b, 40 c to move bias and actuate the two rigid ducts 20 to shift and let the two flexible ducts 30 at the opposite ends of the front rigid duct 20 become curved properly, thus achieving overall adjustment and shift of the dust-sucking arm.

These three adjusting modes for the dust-sucking arm can be optionally employed according to different heights and distances of a dust sucking location. In addition, in an adjusting and shifting process of the dust-sucking arm with any of the above-mentioned three modes, the dust-guiding opening 81 of the wind-guiding shade 80 can simultaneously be adjusted to accurately face the dust sucking location by properly turning the four pivotal connecting strips 92 and the connecting ring 91 of the joint member 90.

As can be understood from the above description, this invention has the following advantages.

1. Various adjusting modes for the dust-sucking arm can be optionally employed, able to position the dust-sucking arm accurately.

2. After being adjusted to a suitable position, the dust-sucking arm can be firmly fixed in position by means of the locking members 70, able to carry out dust sucking and air cleaning work steadily.

3. The dust-sucking arm is simple in structure so cost in manufacturing and assembling is comparative low, conforming to economic gain.

While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention. 

1. A dust-sucking arm of an air cleaning machine comprising: Two rigid ducts; Two flexible ducts, one of said two flexible ducts connected with the wind-guiding opening of said air cleaning machine and one said rigid duct, the other said flexible duct positioned between said two rigid ducts; Three pivotal bases, a first said pivotal base fixed at the location of said wind sucking opening of said air cleaning machine, a second said pivotal base positioned between said two rigid ducts, a third said pivotal base assembled at the outer end of the rear said rigid duct: Two parallel connecting rod units respectively having two parallel connecting rods, said two parallel connecting rod units respectively connected with adjacent said two pivotal bases, a preset connecting rod of each said parallel connecting rod unit fixedly connected with a relative said rigid duct, said rigid duct able to be synchronously moved bias together with said parallel connecting rod unit: Two pressure cylinders respectively having one end pivotally connected with said first pivotal base and said second pivotal base, said two pressure cylinders respectively having the other end pivotally connected with a preset connecting rod of relative said connecting rod unit, said pressure cylinder helping to support said parallel connecting rod unit: and Two locking members respectively fastened at the pivotal portion of any said connecting rod of said two parallel connecting rod units, said locking member able to lock and position said connecting rod on relative said pivotal base, the pivotal portion of said connecting rod impossible to be turned pivotally after being locked by said locking member.
 2. The dust-sucking arm of an air cleaning machine as claimed in claim 1, wherein a rotary base is assembled at the location of said wind-guiding opening of said air cleaning machine for said first pivotal base and relative said flexible duct to be fixed thereon.
 3. The dust-sucking arm of an air cleaning machine as claimed in claim 2, wherein said rotary base is composed of a stationary shaft base and a rotatable base, said stationary shaft base secured at the location of said wind-guiding opening of said air cleaning machine, said stationary shaft base formed with a shaft tube in the center, said rotatable base fitted on said shaft tube of said stationary shaft base, said rotatable base having its topside formed with a connecting tube, said front flexible duct firmly fitted on said connecting tube of said rotatable base.
 4. The dust-sucking arm of an air cleaning machine as claimed in claim 1, wherein said rear rigid duct has its outer end connected with a flexible duct having its outer end connected with a wind-guiding shade.
 5. The dust-sucking arm of an air cleaning machine as claimed in claim 4, wherein a joint member is fitted between said rear rigid duct and said wind-guiding shade, said joint member composed of a connecting ring to be movably fitted on the outer side of said rear flexible duct and four pivotal connecting strips pivotally and equidistantly provided on said connecting ring, symmetrical said two pivotal connecting strips at one side of said connecting ring having their ends firmly connected with said wind-guiding shade, the other two of symmetrical said pivotal connecting strips at the other side of said connecting ring having their ends firmly connected with said rear rigid duct, said wind-guiding shade able to be actuated to turn in any direction by means of said joint member. 